Update: logs/error.log shows only this recent activity on the originating site:
Text Formatted Code
Wed Feb 5 13:39:55 2014 - 108.162.219.50 - 1054: Unknown column 'whos_online' in 'field list' in /home/content/09/9302509/system/lib-sessions.php:486. SQL in question: UPDATE gl_sessions SET start_time = 1391625595, whos_online = 1 WHERE (md5_sess_id = '01007928c4761859d40a65a673bed575')
Wed Feb 5 13:39:59 2014 - 108.162.219.50 - 1054: Unknown column 'whos_online' in 'field list' in /home/content/09/9302509/system/lib-sessions.php:486. SQL in question: UPDATE gl_sessions SET start_time = 1391625599, whos_online = 1 WHERE (md5_sess_id = '01007928c4761859d40a65a673bed575')
Wed Feb 5 14:13:48 2014 - 108.162.219.50 - 1054: Unknown column 'whos_online' in 'field list' in /home/content/09/9302509/system/lib-sessions.php:362. SQL in question: INSERT INTO gl_sessions (sess_id, md5_sess_id, uid, start_time, remote_ip, whos_online) VALUES (896629745, '2129977c1ce7b08adac5a4239cd243bf', 1, 1391627628, '108.162.219.50', 1)
Wed Feb 5 14:13:49 2014 - 108.162.219.50 - 1054: Unknown column 'whos_online' in 'field list' in /home/content/09/9302509/system/lib-sessions.php:362. SQL in question: INSERT INTO gl_sessions (sess_id, md5_sess_id, uid, start_time, remote_ip, whos_online) VALUES (672204130, 'e323efeccbaa6302d1b0136dc3c1e832', 1, 1391627629, '108.162.219.50', 1)
Wed Feb 5 14:18:51 2014 - 108.162.219.50 - 1054: Unknown column 'whos_online' in 'field list' in /home/content/09/9302509/system/lib-sessions.php:362. SQL in question: INSERT INTO gl_sessions (sess_id, md5_sess_id, uid, start_time, remote_ip, whos_online) VALUES (1757656990, '1e48bc48d4bb6707c4fed756e893f79d', 1, 1391627931, '108.162.219.50', 1)
I went back 2 years to the file I used to create the "current" site as it is now, seen
Thank you for your time. I appreciate it.